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    <title>Document</title>
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<body>
    <script>
        let arrayLike ={
            '0':'a',
            '1':'b',
            '2':'c',
            length:3
        };
        //ES5的写法
        var arr1 =[].slice.call(arrayLike);//['a','b','c']

        //ES6的写法
        let arr2 = Array.from(arrayLike);//['a','b','c']
    </script>
</body>
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